section gang vs crew

section gang and crew both are nouns.

Word	Noun	Adjective	Verb	Adverb
section gang	Yes	No	No	No
crew	Yes	No	Yes	No

As nouns, crew is a hypernym of section gang; that is, crew is a word with a broader meaning than section gang:

Other hypernyms of section gang include gang, work party.

section gang (noun)	crew (noun)
a work crew assigned to a section of a railroad	an organized group of workmen
	the men and women who man a vehicle (ship, aircraft, etc.)
	the team of men or women manning a racing shell
	an informal body of friends

section gang (verb)	crew (verb)
	serve as a crew member on